Radiator



Aug. 4, 1925.

M. FIREsToNE RADIATOR Filed Sept. 7, 1920 HIL.

.Vvvvvvvv Patented Aug. 4, 1925 UNITED STATES y 1,548,591 PATENT OFFICE.

MAX FIRESTONE, 0F DETROIT, MICHIGAN, ASSIGNOR T0 FIBESTONE RADIATOR MANU- FACTURING COMPANY, 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

RADIATOR.

Application led September 7, 1920. Serial' No. 408,725.

To all whom z't may concern.'

Be it known that I, MAX FIREsToNE, a citizeny of the United States of America, residing at Detroit, in the county of Wayne '6 and State oi Michigan, have invented certain new and useful Improvements in Radiators, of which the following is a specification, reference being had therein to the acco1npanying drawlngs.

This invention relates to devices for dissipating the heat of fiuids and more particularly to a cooling device or radiator particularly adapted for use in motor vehicle construction. An object of the invention is to provide a core which is simple in construction and eicient in operation, the radiating or heat dissipating fins between water tubes being so constructed as to deiect the air passing through the radiator, thereby securing a maximum cooling effect.

A further object is to provide means for preventing the water from freezing in the f radiator tanks under ordinary circumstances, said means comprising a jacket surrounding the tanks, the jacket for the top tank being connected with the jacket of the 'bottom tank to provide a :tree circulation of an insulatin v medium contained within these jackets.

t is also an object of the invention to provide certain other knew and useful featuresin the construction and arrangement of arts al1 as hereinafter more fully described and particularly pointed out in the appended claim.

With the above and other ends in view, the invention consists in the matters hereinafter set forth, 'and more particularly ointed out in the appended claim, reference being had to the accompanying drawing, in which Figure l is a transverse vertical section substantially upon the line I-I of Fig. 2, of a radiator construction illustrative of the invention and showing the radiator core in front elevation;

Fig. 2 is a vertical section substantially upon line II-II of Fig. 1;

Fig. 3 is an enlarged detail of the core construction showing a portion of a water tule with a lin plate in position thereon; an

Fig. 4 is a perspective view of Fi 3.

As shown in the drawing 1 in icates a bottom tank and 2 a top tank of any desired form or configuration and between these tanks is a fabricated core 3 comprising vertical tubes 4 which open at their lower ends into the bottom tank and at their upper ends lnto the to tank, saidv tubes being secured 1n space relation in any suitable manner. These tubes are each of elongated form, their sides being substantially flat and are constructed from a single piece of sheet metal folded upon itself with the side edges overlapped and solderedtogether as at 5, forming a closed fiat tube which is elongated transversely to extend from the front face of the core to the rear face thereof. Between adjacent tubes are placed iin plates 6 each formed of a single stripof thin sheet metal which is corrugated transversely with the apices of the corrugations contacting the flat sides of the adjacent tubes to dissipate the heat of the waterv passing through these tubes and form a plurality of au' passages extending transversely of the core between the several tubes. These corrugations 7 of the fin plates are preferably of tortuous form in the direction of their length from the front to the rear faces oi the. core` each corrugation having a downwardly inclined portion 8 adjacent lthe front face of the core and meeting at substantially the center line of the core, and upwardly inclined portion 9 extending to near the rear face of the core. The front and rear end portions 10 and 11 of each corrugation extend in substantially a horizontal plane inwardly from the front and rear faces of the core for a short distance. meeting the inclined portions 8 and 9. These corrugations therefore divide each air space-between adjacent water tubes into a large number of air passages and the air entering the forward end of each passage is deflected by coming into contact with the downwardly inclined portion 8 of the corrugation and is again Adefiected by coming into contact with the upwardly inclined wall 9 of the corrugation so that in passing through the 100 core these air streams are deflected from side to side into contact with the walls of the corrugations and a much greater cooling effect is secured thereby, a greater proportion of the radiated heat being carried 105 away by the air currents due to their intimate contact with -the radiating lin plates in passing through thegreat number of air passages formed bv the corrugations. The

front end portion 10 of each air passage llo whic being extended horizontally for a short distance, directs the entering air into the passages in a horizontal direction and against the inclined wall 8 of the corrugation and in leaving the passage the air is again deected into a horizontal direction by the 4horizontal end portion 11 of the passage, the air issuing therefrom in a direction directly toward the engine to which the radiator is` connected in the usual manner.

The water tubes 4 being substantially flat With their side walls formed of thin sheet metal and extending in parallel spaced rel'ation, the freezing of the thin body of water contained in these tubes will not crack the tubes and cause them to leak for the reason that the expansion of this thin body of Water upon freezlng will not be great enough to extend these walls beyond the limit of their liexbilit as the metal is Very thin and the Wallis at and free to bend between the line of contact of the tin lates therewith and these fin plates being of) Very thin metal and corrugated will'also yield suiiiciently to provide for any expansion ofwater contained in the tubeswhen it freezes.

It is common practice to use a portion of alcohol or other non-freezing fluid in the circulating water to prevent the freezing of the water, but it is found that such mixture is not entirely satisfactory due to the fact that it causes foaming when the circulating water becomes heated. It is therefore "def sirable to provide some means whereby the use of such a fluid becomes unnecessary and in the present construction this provision is made by forming the water tank 1 and the top tank 2 with a double outer wall which provides a space or jacket 12y enclos' ing these tanks, except at the places of connection of the tubes 4 with the tanks. Within this jacket or space 12 may be placed a non-freezing iuid through a fill opening 13 and the jacket surrounding the to tank 2 is preferably connected with the jacket of the bottom tank 1 in some suitable manner, as b providing vertical walls 14 and 15 are s aced a art-at each end of the radiator and) provid; vertical end passa es 16 connecting the s ace or jacket a ong e upper tank with t e jacket of the lower tank. The non-freezing fluid is thus free to circulate from one to the other of the jackets and the vertical assa es 16 provide insulating columns of) Huid at the ends of the core. Each water tank is thus enclosed by an insulati'n jacket and protected against freezin un er normal conditions so that each wi l contain a body of fluid even though the water tubes 4 ofthe core should freeze solid. Therefore the engine may be started without danger of injury due to lack of water as the tanks will always contain a sufficient quantity to provide for the running of the engine for a short time which will heat this water and will gradually thaw out the frozen tubes. The necessity for placing a non-freezing fluid in the circulating water is therefore obviated under ordinary weather temperatures as the construction of the core is such that it is not afected'or injured by the freezing of the water contained therein and the jacketing of the tanks prevents the water in these tanks from freezing.

Obviously changes ma be made in the form and construction o the several parts and within the scope of the appended claim without departin from the spirit of my invention and I o not therefore limit myself to the particular construction shown.

Having thus freely described my invention, what I claim is:

In a radiator, wherein a core is composed of flat parallel spaced tubes, spacers for such tubes composed of iin plates formed with a plurality of transverse corrugations with the apices of the corrugations in contact with the fiat side walls of the adjacent tubes, said corrugations being formed with downwardly inclined vintermediate portions meeting upwardly inclined intermediate portions and said intermediate portions meeting horizontal end portions to form tortuous air passages extending from the front A to the rear of the radiator core.

In testimony whereof I ailix my signature in presence of two witnesses.

MAX FIRESTONE.

Witnesses:

ANNA M. Donn, CEAS. W. Summum. 

